A password isn’t enough and even the most unique password can be leaked and discovered by bad actors. Two-factor authentication (2FA) offers another level of protection by using an app to deliver you an always changing, timed code to use once you enter your password.
A note of caution: if a website offers 2FA, always choose the option to use either an app or even a hardware key, but avoid SMS. While SMS is still better than no 2FA, SMS messages can be intercepted and are not as secure.
Use Instead Of: Google Authenticator, Microsoft Authenticator.
Go beyond the password and protect yourself from hackers and account takeovers.
FreeOTP is another open source two-factor authentication application for systems utilizing one-time password protocols. Availabe on both Android and iOS devices.
An easy-to-use, open-source two-factor authentication app designed specifically for iOS.
andOTP is an open source two-factor authentication App for Android 4.4+.